CSS problem (scrollable table)

This is a static html page extracted from my project to show you the issue: you can see on the bottom right box a table. The content of the table (the table body, but not the header) should be scrollable. It is working fine on FireFox, but is it not working on Internet Explorer (tested on IE7 and IE9).

If you look at this browser stat on the link, you can see
IE usage is dropping into 1x % and IE has a lot of
techincal issue,

So I suggest why ask your users switch to Google Chrome instead of
keeping wasting time on IE that I did before and give it up in last two years.
Chrome browser is much faster and stable than Firefox and specially for IE

@ duncanb7
That's funny lol
IE usage is around 30% (and increasing) - w3schools stats are not reliable since they measure their own usage which by the very nature of their site is developers who tend to use FF and Chrome.

After I switch to Chrome, I never experience many technical issue as IE does
And I also gave up FF since FF's latest version is much much slower
than its older version and Chrome.

Even the data just check and based on W3schools server but I think that
is liable if you look at how many users use w3schools daily by Alexa's rank
for global, I believe the stat sample users is larger enough for statistic

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